Illinois Senator Stephen A. Douglas believed he had the solution to decide whether states would be slave states or free states. It was his good intent that developed the Kansas-Nebraska Act of 1854. Part of this law included the Fugitive Slave Act. This made slavery a national issue.
The Kansas-Nebraska Act of May 30th 1854, created the territories of Kansas and Nebraska, opened new lands, and allowed settlers in those territories to determine if they would allow slavery within their boundaries.
Many southerners supported the Kansas-Nebraska Act because it allowed the citizens of these two newly formed states to choose, by popular vote, whether or not to be a slave state. The Kansas-Nebraska Act was passed in 1854.